<!DOCTYPE html>
<title>
  Single-line column flex fragmentation: Negative margins.
</title>
<link rel="help" href="https://drafts.csswg.org/css-flexbox-1/#pagination">
<link rel="match" href="../../reference/ref-filled-green-100px-square.xht">
<style>
  #flex {
    display: flex;
    flex-direction: column;
  }
</style>
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div style="height: 100px; width: 100px; background: red; position: absolute">
  <div style="margin-top: 150px; margin-left: -40px; width: 100px; height: 100px; columns: 5; column-gap: 0; column-fill: auto;">
    <div id="flex">
      <div style="height: 150px; width: 20px;"></div>
      <div style="height: 100px; margin-top: -150px; width: 100px; break-before: column; background: green;"></div>
    </div>
  </div>
</div>
